TC39 urges caution when using Stage 2-or below proposals, as it might result in inadvertent pressure from the community to keep the implementation as-is instead of improving it for fear of breaking existing code or ecosystem fragmentation (e.g. using a different symbol like # instead of @ for decorators).

It's completely understandable that this happens without realizing it, but continuing to do so sets different expectations for how the language progresses. It's nothing to feel guilty about — we learn as a community and remind one another of how JavaScript works.

Therefore, it's easy to search around for tweets/blog posts/talks that say "ES7 Decorators" and find that it's become the accustomed name for it.